Hello there:
I have a T30 bayonet with the same stamps.
From Japaneseicon Military Bayonets & Machetes 3rd edition by Jerry L. Price. Page 16c.
Here's what he says. His bayonet was inspected by Nagoya [ I don't see that stamp on the pommel ] and the stamp is/was unknown. He says that the stamp translates to either Peaceful or Ordinary. Some time between the 2nd and this 3rd edition, some one informed him that the stamp was used in Korea for Heijo { know called Pyongyang, NK }. This was the second largest training base in Korea for the Japanese army, the first was in Seoul.
From that, I would take it our bayonets are trainers and issued to that training base.
Hope this helps some.